21287750

素因数分解:

$2^1\times 5^3\times {\mathrm{11}}^1\times {\mathrm{7741}}^1$

素因数の和:7769

約数の個数: 32

約数和(自身を含む): 43479072

約数和(自身を除く): 22191322

約数列:

[1, 2, 5, 10, 11, 22, 25, 50, 55, 110, 125, 250, 275, 550, 1375, 2750, 7741, 15482, 38705, 77410, 85151, 170302, 193525, 387050, 425755, 851510, 967625, 1935250, 2128775, 4257550, 10643875, 21287750]

約数ペア:

[(1, 21287750), (2, 10643875), (5, 4257550), (10, 2128775), (11, 1935250), (22, 967625), (25, 851510), (50, 425755), (55, 387050), (110, 193525), (125, 170302), (250, 85151), (275, 77410), (550, 38705), (1375, 15482), (2750, 7741)]